Idea is "truth" (p. 385 [320-321], § 213).
Idea, i.e., truth, as process — for truth is a
process — passes in its development
(Entwicklung) through three stages: 1) life; 2) the process
of cognition, including human practice and technique (see above).

Life gives birth to the brain. In the human brain, nature is reflected. By testing and applying in his practice
and in technique the correctness of these reflections,
man arrives at objective truth.
Truth is
a process. From
the subjective
idea, man
proceeds to
objective truth
through
"practice" (and
technique).